The battery finally gave out after all these years. I could only listen while it was plugged in to power, no iTunes for sync'ing music
Reviewed instructions from IFIXIT.com and followed along. The first part of splitting the case was aggravating. I needed something like a guitar pick as I saw others post, so I found something that would work. I got the bottom open just enough to insert my small flat piece of plastic and started working the case, done... Once you get going and it's pretty easy. Take your time. Followed the rest as the instructions says, really 20 minutes.
Use a guitar pick or some flat nylon piece once you get going on splitting the case, it helps. The rest is as the instructions says, no guesswork involved. Take your time, the hard part is that first step and the pick does help.